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HEAD-TO-HEAD TAX COMPARISON · 2026

COUNTRY A Ireland VS COUNTRY B Japan

Side-by-side analysis of income tax, effective rates, and take-home pay for Ireland and Japan in 2026.

Daniel · CountryTaxCalc Updated June 2026 Tax Comparison 2026
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OVERVIEW
Ireland and Japan represent two very different approaches to income tax that converge at a similar total burden by high incomes. Ireland's top combined rate of 52% — comprising 40% income tax, 8% USC (Universal Social Charge), and 4% PRSI — applies above €70,044 and looks higher than Japan's structure. However, Ireland's powerful 20% standard rate band (first €42,000 of income for single earners in 2026) means that mid-range earners pay 20% income tax on a substantial portion of their income. Japan's national income tax (5%–45%) is progressive with a 2.1% reconstruction surtax and a separate ~10% residence tax, but the employment income deduction (up to JPY 1,950,000 for employed workers) materially reduces the taxable base. At €30,000, Ireland is dramatically cheaper — the 20% band and personal tax credits (€3,750 combined for PAYE employees) create a much lighter burden than Japan's residence tax + social security. At €60,000, Ireland maintains a €3,000–€4,000 advantage. By €90,000, the two systems reach near-parity. Above €150,000, Japan edges ahead as Ireland's USC 8% band and PRSI apply to all earnings without caps. Japan's 20.315% flat capital gains on listed equities is significantly more competitive than Ireland's 33% CGT, making Japan materially better for investment-focused high earners.
Section 01

The Big Picture

Top-line rates and effective take-home for a typical earner — including income tax, social contributions, and applicable surcharges.
🇮🇪
COUNTRY A
Ireland
TAX RATE
52%
Top Combined Rate
40% income tax + 8% USC + 4% PRSI on income above €70,044
🇯🇵
COUNTRY B
Japan
TAX RATE
~55%
Top Combined Rate
45% national + 10% residence tax; effective rates lower due to employment income deduction and SS caps
TYPICAL ANNUAL DIFFERENCE
Moving from Japan → Ireland at €60,000
€3,100
That's €258/month back in your pocket
Section 02

Tax Savings by Income Level

Net take-home after all income tax, social contributions, and surcharges — for a single employee with no dependents.
GROSS INCOME
🇮🇪 IE TAX
🇯🇵 JP TAX
SAVINGS
10-YEAR
€30,000
€3,900
€8,200
€4,300 cheaper in IE
€43,000
€60,000
€15,600
€18,700
€3,100 cheaper in IE
€31,000
€90,000
€30,700
€31,000
Roughly equal (€300 cheaper in IE)
€3,000
€150,000
€61,900
€63,100
€1,200 cheaper in IE
€12,000
💡

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🇮🇪

Ireland Pros & Cons

+ PROS
  • 20% standard rate band: the first €42,000 of income (single 2026) is taxed at just 20% — for a €60,000 earner, €42,000 is protected at the lower rate. This single feature makes Ireland dramatically cheaper than Japan at low-to-mid incomes
  • Personal + PAYE tax credits: €1,875 personal credit + €1,875 PAYE (employee) credit = €3,750 deducted directly from tax liability — this is equivalent to removing the income tax on the first approximately €18,750 of earnings entirely
  • No capital gains tax at death (principal private residence): Ireland's CGT principal private residence exemption means the family home passes free of CGT on sale. Ireland's 33% CGT rate is still significant, but PPR relief protects the most common asset
  • SARP (Special Assignee Relief Programme): qualifying employees assigned to Ireland by a foreign employer can exclude 30% of salary above €100,000 from income tax for up to 5 years — reduces effective top rate significantly for senior international assignees
− CONS
  • 8% USC above €70,044: the Universal Social Charge spikes to 8% on earnings above €70,044 — combined with 40% income tax and 4% PRSI, the marginal rate reaches 52% above that threshold
  • PRSI 4% with no earnings ceiling: unlike most European social contributions, PRSI applies at 4% on all employment income with no cap — at €150,000, PRSI alone adds €6,000 to the total bill
  • 33% capital gains tax: Ireland's CGT rate is one of the highest in the developed world for listed equities — well above Japan's flat 20.315% and significantly above Canada or the UK's rates
  • CAT (Capital Acquisitions Tax): Ireland charges 33% on inheritances above tax-free group thresholds (Group A: €335,000 from parent; Group B: €32,500 from other relatives) — Japan's inheritance tax is potentially more onerous but only kicks in at high estate values
🇯🇵

Japan Pros & Cons

+ PROS
  • Employment income deduction: Japan's kyūyo shotoku kōjo provides a deduction of up to JPY 1,950,000 for employed workers — this reduces taxable income substantially and is why Japan's effective rates are far lower than the 55% headline rate implies
  • Social security caps: health insurance (~4.99% employee) and pension (9.15% employee) both have remuneration ceilings. Above approximately €52,000/year equivalent, Japan's SS burden as a percentage of income falls — making Japan increasingly competitive at high incomes
  • 20.315% flat capital gains on equities: Japan taxes listed shares, ETFs, and most investment trusts at a flat 20.315% — significantly lower than Ireland's 33% CGT. For investors with substantial portfolios, this difference compounds significantly over time
  • NISA (Nippon Individual Savings Account): growth ISA contributions up to JPY 2.4M/year + tsumitate (lump sum) JPY 1.2M/year grow completely tax-free. Designed for long-term investment, NISA is a powerful wealth-building tool that Irish residents cannot access
− CONS
  • Residence tax year-2 billing: Japan's jūminzei (~10%) is based on prior-year income and billed starting June of the following year — new arrivals face a large tax bill in year 2 with no deduction available in year 1, creating a cash-flow challenge on arrival
  • Health insurance co-payments: Japan's healthcare requires a 30% co-pay on most medical treatments, unlike Ireland's GP visit card and hospital services. Dental, optical, and some specialist care can be expensive out-of-pocket despite mandatory health insurance
  • Complex SS structure: Japan's employee SS covers health insurance (kenkou hoken), pension (kōsei nenkin), employment insurance (koyou hoken), and workers' accident compensation — administered separately, with different remuneration bases and contribution rates requiring careful tracking
  • Administrative burden in Japanese: tax filing, health insurance registration, and pension management are conducted in Japanese. Expats typically require professional assistance (zeirishi / tax accountant) at meaningful cost
FAQ

Frequently Asked Questions

Is Ireland or Japan cheaper for income taxes?

Ireland is cheaper at €30,000 and €60,000 — and the saving is significant (€4,300 and €3,100 per year respectively). At €30,000, Ireland's 20% standard rate band combined with €3,750 in personal tax credits produces a total bill of only €3,900; Japan's residence tax and social security produce €8,200 at the same income. By €90,000, the two countries reach near-parity (€30,700 vs €31,000). Above €150,000, Ireland remains marginally cheaper. Japan wins for capital gains — 20.315% flat versus Ireland's 33% CGT. For salaried workers at low-to-mid incomes: Ireland is clearly better. For investment-focused high earners: Japan is more competitive.

What is Japan's employment income deduction?

Japan's kyūyo shotoku kōjo (employment income deduction) is a statutory deduction applied to employment income before calculating taxable income. The deduction uses a tiered formula: for income up to JPY 1.8M: 55% (minimum JPY 550,000); JPY 1.8M–3.6M: 40% minus JPY 100,000; JPY 3.6M–6.6M: 30% plus JPY 170,000; JPY 6.6M–8.5M: 20% plus JPY 830,000; above JPY 8.5M: flat JPY 1,950,000 (maximum). For a €90,000 earner (approximately JPY 13.5M): the deduction is JPY 1,950,000 (maximum), reducing taxable income by ~JPY 1,950,000. This is equivalent to exempting the first ~€13,100 of income from tax — a substantial benefit. Ireland has no equivalent employment income deduction, though the PAYE credit (€1,875) performs a similar function at lower incomes.

How does Ireland's USC compare to Japan's reconstruction surtax?

Ireland's USC (Universal Social Charge) is a significant secondary income tax: 0.5% on first €12,012; 2% on €12,013–€25,760; 3% on €25,761–€70,044; 8% on income above €70,044 (11% for self-employed above €100,000). It generates meaningful revenue and significantly increases Ireland's marginal rate above €70,044. Japan's reconstruction surtax is 2.1% applied to national income tax (not directly on income) — so it adds 2.1% of the income tax liability, not 2.1% of income. For a €90,000 earner with approximately €13,000 in national income tax: the surtax is ~€273 — relatively modest. Ireland's USC at €90,000 adds approximately €2,600–€3,000 above the €70,044 threshold. The Irish USC is substantially more burdensome than Japan's reconstruction surtax.

How do capital gains tax rates compare between Ireland and Japan?

Ireland: CGT rate 33% on most capital gains. Annual exempt amount: €1,270. Primary residence: exempt (principal private residence relief). Real estate held for investment: 33% on gains. No CGT at death, but CAT (inheritance tax) at 33% above thresholds applies. Japan: flat 20.315% on capital gains from listed shares, ETFs, and investment trusts (15% national + 5% residence + 0.315% reconstruction surtax). Unlisted company shares: taxed as income on sale or as part of business income. Primary residence exemption: up to JPY 30M gain exempt if conditions met. NISA gains: completely tax-free within the annual limit. Japan's 20.315% rate is 12.685 percentage points lower than Ireland's 33% rate — for an investor selling €500,000 of shares: Japan saves €63,425 in CGT versus Ireland. For investment-focused earners, Japan's capital gains regime is a major advantage.

What is Ireland's SARP and is there an equivalent in Japan?

Ireland's SARP (Special Assignee Relief Programme) provides 30% income tax relief on salary above €100,000 for qualifying employees assigned to Ireland by a foreign employer or newly hired from abroad. Duration: up to 5 years. Additional benefits: one return flight home per year, costs of schooling. Conditions: minimum €100,000 salary; must not have been Irish tax resident for 5 years prior to assignment. Japan has no equivalent general expat flat-rate income tax regime. The closest Japanese equivalent is preferential treatment for qualifying foreign experts assigned to Japan under specific bilateral arrangements — but these are narrow and do not create the broad expat advantage that SARP provides in Ireland. For senior executives assigned to Ireland earning €200,000+: SARP can save €30,000+/year in income tax alone, making Ireland very competitive at high incomes. Japan does not offer a comparable incentive.

Does Japan have inheritance tax and how does it compare to Ireland's CAT?

Japan: Japan has inheritance tax (sōzoku-zei) that can reach 55% on large estates. Structure: heirs pay tax based on their share of the inherited estate. Rates range from 10% on the first JPY 10M of taxable inheritance to 55% above JPY 600M. Deductions: JPY 30M basic + JPY 6M per statutory heir. For a JPY 100M estate (≈€671,000) divided between 2 heirs: each receives JPY 50M, deduction JPY 18M, taxable JPY 32M, tax ~10%–20% = approximately JPY 3.2M–6.4M per heir. Ireland: CAT (Capital Acquisitions Tax) at 33% on inheritances above group thresholds: Group A (parent to child): €335,000 tax-free; Group B (more distant relatives): €32,500. Above these thresholds: flat 33%. For substantial estates, Japan's 55% top rate exceeds Ireland's 33% flat rate. For moderate estates: Ireland's lower threshold (€335,000 for Group A vs €45M+ in Japan before high rates) can make Ireland more expensive for family wealth transfer.

What are the visa options for moving from Ireland to Japan?

Moving from Ireland to Japan requires a Japanese visa. Main categories: Highly Skilled Professional Visa: points-based visa for qualified academics, engineers, managers, and researchers. Points awarded for income (70+ points for JPY 10M+), qualifications, and age. Provides fast-track permanent residency (1 year vs standard 5–10 years). Engineer/Specialist in Humanities/International Services visa: standard work visa for employed professionals — sponsored by a Japanese employer. Required for most employment in Japan. Business Manager visa: for those establishing or managing a business in Japan. Minimum requirements apply. Startup Visa: some municipalities offer a startup visa for entrepreneurs. Long-term residency requires continuous employment or investment. Unlike EU freedom of movement within Europe, Irish citizens need to actively apply for Japanese visas and residence permits, with language requirements and employer sponsorship as common prerequisites.

How do pension systems compare between Ireland and Japan?

Ireland: State Pension (Contributory) 2026 — up to approximately €14,420/year (€277/week) for the full pension. Requires 10–40 qualifying social insurance contributions years. Flat-rate pension regardless of income. Private pension: PRSA and company schemes with income tax deduction on contributions (capped at 15%–40% of income depending on age). Japan: State pension (kōsei nenkin) — income-related, based on standard monthly remuneration × 5.481% × years of contribution. Average kōsei nenkin payment approximately JPY 1,447,000/year (~€9,700) for average-income contributors. Individual DC pension (ideco): contributions up to JPY 276,000/year deductible for employees with company pension. Japan's earnings-related state pension is more generous for high earners than Ireland's flat-rate pension. Ireland's private pension deduction system (up to 40% deduction at age 60+) allows greater tax-deferred saving at high incomes.
From the brief
PT20%qualifying work, 10yr
IT€300kall foreign income, 15yr
GR7%foreign income, 15yr
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